Offline installation of JBoss Tools not possible

It is currently not possible to do an offline install of JBoss Tools 3.1.0GA from the p2 repo zip file.
It seems the provided site master archive is incomplete (http://downloads.sourceforge.net/jboss/JBossTools-Update-3.1.0.v201003050540R-H56-GA.zip)
When attempting to install offline, the Smooks UI plugin fails to find a required dependency, generating the log attached below.
This behavior can be reproduced by following the official installation instructions, but modifying step 8 by unchecking "Contact all update sites during install".
http://www.jboss.org/tools/download/installation/update_3_1.html#fromzip
The only alternative is to install with a connection to the internet, which is not always possible.

Image of the problem: http://imgur.com/DqJhF.png
Log:
!SESSION 2010-04-22 19:35:41.471 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.6.0_20
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_GB
Framework arguments: -product org.eclipse.epp.package.jee.product
Command-line arguments: -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product

!ENTRY org.eclipse.equinox.p2.ui 4 0 2010-04-22 19:36:31.018
!MESSAGE Operation details
!SUBENTRY 1 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.018
!MESSAGE Cannot complete the install because one or more required items could not be found.
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.019
!MESSAGE Software being installed: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.019
!MESSAGE Missing requirement: Smooks Tools UI Plug-in 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.ui 1.1.0.v201003050540R-H56-GA) requires 'bundle

org.eclipse.zest.core 0.0.0' but it could not be found
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.019
!MESSAGE Cannot satisfy dependency:
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.019
!MESSAGE From: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.019
!MESSAGE To: org.jboss.tools.smooks.ui [1.1.0.v201003050540R-H56-GA]

!ENTRY org.eclipse.equinox.p2.ui 4 0 2010-04-22 19:36:31.020
!MESSAGE Operation details
!SUBENTRY 1 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.020
!MESSAGE Cannot complete the install because one or more required items could not be found.
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.020
!MESSAGE Software being installed: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.020
!MESSAGE Missing requirement: Smooks Tools UI Plug-in 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.ui 1.1.0.v201003050540R-H56-GA) requires 'bundle

org.eclipse.zest.core 0.0.0' but it could not be found
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.020
!MESSAGE Cannot satisfy dependency:
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.020
!MESSAGE From: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.020
!MESSAGE To: org.jboss.tools.smooks.ui [1.1.0.v201003050540R-H56-GA]

!ENTRY org.eclipse.equinox.p2.ui 4 0 2010-04-22 19:36:31.024
!MESSAGE Operation details
!SUBENTRY 1 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.024
!MESSAGE Cannot complete the install because one or more required items could not be found.
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.024
!MESSAGE Software being installed: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.024
!MESSAGE Missing requirement: Smooks Tools UI Plug-in 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.ui 1.1.0.v201003050540R-H56-GA) requires 'bundle

org.eclipse.zest.core 0.0.0' but it could not be found
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.024
!MESSAGE Cannot satisfy dependency:
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.024
!MESSAGE From: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.024
!MESSAGE To: org.jboss.tools.smooks.ui [1.1.0.v201003050540R-H56-GA]

!ENTRY org.eclipse.equinox.p2.ui 4 0 2010-04-22 19:36:31.065
!MESSAGE Operation details
!SUBENTRY 1 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.065
!MESSAGE Cannot complete the install because one or more required items could not be found.
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.065
!MESSAGE Software being installed: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.065
!MESSAGE Missing requirement: Smooks Tools UI Plug-in 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.ui 1.1.0.v201003050540R-H56-GA) requires 'bundle

org.eclipse.zest.core 0.0.0' but it could not be found
!SUBENTRY 2 org.eclipse.equinox.p2.director 4 1 2010-04-22 19:36:31.065
!MESSAGE Cannot satisfy dependency:
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.065
!MESSAGE From: Smooks Tools 1.1.0.v201003050540R-H56-GA (org.jboss.tools.smooks.feature.feature.group 1.1.0.v201003050540R-H56-GA)
!SUBENTRY 3 org.eclipse.equinox.p2.director 4 0 2010-04-22 19:36:31.065
!MESSAGE To: org.jboss.tools.smooks.ui [1.1.0.v201003050540R-H56-GA]